28. 並列コレクション import static groovyx.gpars.GParsPool.withPool def nums = 1..100000 withPool(5) { def squares = nums. collectParallel{ it ** 2 }. grepParallel{ it % 7 == it % 5 }. grepParallel{ it % 3 == 0 } println squares[0..3] + "..." + squares[-3..-1] assert squares[0..3] == [36, 144, 1089, 1296] } 30. 並列コレクション import static groovyx.gpars.GParsPool.withPool def nums = 1..100000 withPool(5) { def